I mowed a 2 acre field yesterday (not my lawn) with my Ferris IS700Z, BS 26 Vanguard on 1.5 gal of gas....measured the refill amount to top off the tank. Looks like my lawn. Field looks like a rectangle cut in half diagonally. On the point, the ZT just passes the corner, a little back pressure on the short side handle lining up with the new direction, both handles forward and away you go. Square corners are.....just turn the corner and keep on going.
With my tractor and 3 pt cutter I used initially, it was a lot of looping at the corners, rough cut, tractor tire marks, missed grass/weeds when present, and coming back with the final X to clean up the corners. Took twice as long. Didn't measure the fuel.....diesel Ford tractor....just runs and runs and every once in awhile you fill it up. But on the Vanguard, at 3 bucks a gallon, less than 5 bucks to do 2 acres and get the results I got.....yepper I'll take it.